A power air outlet structure with an IP56 protection rating

Abstract

The present invention belongs to the technical field of aircraft ground power supply, and relates to an air outlet structure of a power supply with an IP56 protection level. A square ventilation opening is provided at the top of the box cover. An outer eaves is fixedly arranged in the square ventilation opening. A wind guide cover is fixedly installed above the outer eaves. The wind guide cover is an edge frame with a V-shaped structure. A plurality of downward-opening louver windows are provided on the outer inclined side of the edge frame with a V-shaped structure. A plurality of water outlets are provided at the bottom of the edge frame with a V-shaped structure. An upper cover is fixedly installed above the box cover. A water blocking cover is fixedly installed on the lower surface of the upper cover. The water blocking cover is provided with a water blocking cover opening. The periphery of the water blocking cover opening is a horizontal installation frame. The outer edge of the horizontal installation frame is integrally formed with an inclined surface extending outward and downward, and a notch is provided in the width direction of the inclined surface. A filter cotton is fixedly arranged between the border of the water blocking cover and the border of the wind guide cover. The present invention not only meets the IP56 protection requirements of the power supply box body, but also meets the heat dissipation requirements.

Description

Technical Field

[0001] The present invention belongs to the technical field of aircraft ground power supply, and particularly relates to an air outlet structure of a power supply with an IP56 protection level. Background Art

[0002] When an aviation ground power supply powers an aircraft, usually the power supply is installed outdoors, so there are relatively high requirements for rain protection of the power supply. Especially in island airports, the protection level requirement for the power supply reaches IP56. However, a large amount of heat is dissipated by power modules, transformers, inductors, etc. inside the power supply, and sufficient air volume is required to discharge the heat from the power supply box. Increasing the air outlet may cause the protection level to fail to meet the requirements, resulting in water ingress into the power supply, which in turn easily causes failures of power devices or circuits in the power supply.

[0003] Currently, there are usually two design methods for the air outlet structure of the power supply. One is to add a brim above the power supply chassis to block relatively large rain. The other method is to use a finished rainproof louver. The method of adding a brim occupies a large amount of space above the power supply and is very inconvenient for power supply maintenance. The protection level of using a finished rainproof louver is generally IP54, which cannot meet the protection requirement of IP56. Summary of the Invention

[0004] The present invention is to solve the above technical problems, and provides an air outlet structure of a power supply with an IP56 protection level, so as to solve the problem that the power supply box can meet the requirements of the IP56 protection level and have sufficient air outlet area to meet the power supply heat dissipation requirements. The present invention is implemented by adopting the following technical solutions:

[0005] An air outlet structure of a power supply with an IP56 protection level includes a box cover. A square ventilation opening is provided at the top of the box cover. An outer brim is fixedly arranged in the square ventilation opening. A wind guide cover is fixedly installed above the outer brim. A wind guide opening with the same size and structure as the square ventilation opening is provided in the middle of the wind guide cover. The periphery of the wind guide opening is an edge frame with a V-shaped structure. A plurality of downward-opening louver windows are provided on the outer inclined side of the edge frame with a V-shaped structure. A plurality of water outlets are provided at the bottom of the edge frame with a V-shaped structure. An upper cover is fixedly installed above the box cover. Lower protruding frames are integrally formed and fixedly arranged at both ends of the upper cover in the width direction. The lower surface of the lower protruding frame is fixedly connected to the upper surfaces at both ends of the box cover in the width direction. A water blocking cover is fixedly installed on the lower surface of the upper cover. A water blocking cover opening with the same size and structure as the square ventilation opening is provided in the upper part of the water blocking cover. The periphery of the water blocking cover opening is a horizontal installation frame. An inclined surface extending outward and downward is integrally formed on the outer edge of the horizontal installation frame. And a notch is provided in the width direction of the inclined surface. A filter cotton is fixedly arranged between the frame of the water blocking cover and the frame of the wind guide cover.

[0006] Preferably, the edge frame of the V-shaped structure further includes an inner inclined lower edge, a horizontal protruding edge, and an inner upper inclined edge. The lower part of the outer inclined edge intersects with the lower part of the inner inclined lower edge. The upper part of the inner inclined lower edge intersects with the outer end of the horizontal protruding edge. The inner end of the horizontal protruding edge intersects with the lower part of the inner upper inclined edge. The intersection of the outer inclined edge and the lower part of the inner inclined lower edge forms a V-shaped structure.

[0007] Preferably, the filter cotton is clamped between the inner wall of the water blocking cover and the horizontal protruding edge of the air guiding cover.

[0008] Preferably, a fan fixing plate is fixedly installed on the inner side of the outer eaves, and an exhaust fan is fixedly installed below the fan fixing plate.

[0009] Preferably, the fan fixing plate includes an integrally formed lower horizontal plate and upper vertical plates at both ends of the lower horizontal plate. The upper vertical plates are fixedly installed on the inner side of the outer eaves and the box cover, and a part of the upper end of the upper vertical plate extends into the lower part of the air guiding cover.

[0010] Preferably, the box cover is welded above the frame of the power supply box body.

[0011] The beneficial effects of the present invention are as follows:

[0012] After the box cover, the air guiding cover, the water blocking cover, and the upper cover are installed in sequence at the specified positions, a curved air duct is formed. At the same time, the filter cotton is clamped between the air guiding cover and the water blocking cover. In this way, when the outside of the power supply box body is violently sprayed with water, the water will not enter the inside of the power supply box body. At the same time, the air inside the power supply box body can be discharged outside the box body through the curved air duct. The present invention not only meets the IP56 protection requirements of the power supply box body, but also can discharge a large amount of air inside the power supply box body quickly outside the box body, while meeting the heat dissipation requirements of the power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the front view structural schematic diagram of the power supply air outlet structure of the embodiment of the present invention;

[0014] Figure 2 is Figure 1 the sectional structural schematic diagram taken along the A-A direction in

[0015] Figure 3 is the exploded structural schematic diagram of the power supply air outlet structure of the embodiment of the present invention;

[0016] Figure 4 is the structural schematic diagram of the power supply air outlet structure of the embodiment of the present invention with the upper cover opened;

[0017] Figure 5 is the internal three-dimensional structural schematic diagram of the upper cover of the power supply air outlet structure of the embodiment of the present invention;

[0018] Figure 6Schematic three-dimensional structure diagram of the air guide cover according to an embodiment of the present invention;

[0019] Figure 7 Schematic cross-sectional view of one side edge frame of the air guide cover according to an embodiment of the present invention;

[0020] Figure 8 Schematic three-dimensional structure diagram of the box cover according to an embodiment of the present invention;

[0021] In the figure, 1. upper cover, 2. water blocking cover, 3. air guide cover, 4. box cover, 5. exhaust fan, 6. fan fixing plate, 7. filter cotton, 8. square ventilation opening, 9. outer eaves, 10. louver window, 11. notch, 12. water outlet, 13. outer bevel edge, 14. inner lower bevel edge, 15. horizontal protruding edge, 16. inner upper bevel edge. Detailed implementation manners

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0023] A power outlet structure with an IP56 protection level includes: a box cover 4, which can be welded above the frame of the power box body and is a part of the frame of the power box body. A square ventilation opening 8 that penetrates upward is provided at the top of the box cover 4, and an outer eaves 9 is fixedly arranged in the square ventilation opening 8. The outer eaves 9 includes an integrally formed square vertical clamping frame and an upper horizontal protruding frame. The outer diameter of the square vertical clamping frame is slightly smaller than the inner diameter of the square ventilation opening 8, and the outer diameter of the upper horizontal protruding frame is larger than the inner diameter of the square ventilation opening 8. After the square vertical clamping frame is inserted into the square ventilation opening 8, it is fixed by bolts, and the lower surface of the upper horizontal protruding frame abuts against the upper surface of the box cover 4. By providing the outer eaves 9, it is convenient to install the fan fixing plate 6. Different fan installation hole positions are provided on the fan fixing plate 6, and different numbers of exhaust fans 5 can be set according to requirements. In this embodiment, up to four exhaust fans 5 can be installed. According to the maximum number of exhaust fans 5 that can be installed, the maximum air outlet area is calculated, and based on this area, the cross-sectional area of the air duct formed by the combination of the box cover 4, the water blocking cover 2, the air guide cover 3, and the upper cover 1 is designed, and this cross-sectional area meets the air outlet requirements of the maximum number of exhaust fans 5.

[0024] Above the outer eaves 9, a wind guide cover 3 is fixedly installed by means of bolt connection. In the middle of the wind guide cover 3, a wind guide opening with the same size and structure as the square ventilation opening 8 is provided. The periphery of the wind guide opening is an edge frame with a "V" - shaped structure. The edge frame includes an integrally formed outer bevel edge 13, an inner lower bevel edge 14, a horizontal protruding edge 15, and an inner upper bevel edge 16. The lower parts of the outer bevel edge 13 and the inner lower bevel edge 14 intersect. The upper part of the inner lower bevel edge 14 intersects with the outer end of the horizontal protruding edge 15. The inner end of the horizontal protruding edge 15 intersects with the lower part of the inner upper bevel edge 16. The lower parts of the outer bevel edge 13 and the inner lower bevel edge 14 intersect to form a "V" - shaped structure. A number of downward - opening louver windows 10 are evenly arranged on the outer bevel edge 13. The louver windows 10 are directly punched by a punching mechanical die. The processing method is relatively simple and the cost is relatively low. At the bottom of the "V" - shaped structure formed by the intersection of the outer bevel edge 13 and the inner lower bevel edge 14, a number of water outlets 12 are also provided.

[0025] Inside the outer eaves 9, a fan fixing plate 6 is fixedly installed by means of bolt connection. The fan fixing plate 6 has a "mouth" - shaped structure with an open upper part, including an integrally formed lower horizontal plate and upper vertical plates at both ends of the lower horizontal plate. The upper vertical plates are fixedly installed on the inner side of the outer eaves 9 and the box cover 4 by bolts. A part of the upper end of the upper vertical plate extends into the lower part of the wind guide cover 3. A exhaust fan 5 is fixedly installed below the fan fixing plate 6. The exhaust fan 5 quickly discharges the heat inside the power supply upward and laterally.

[0026] Above the box cover 4, an upper cover 1 is fixedly installed by means of bolt connection. At the edge positions of both ends in the width direction of the upper cover 1, integrally formed and fixedly arranged lower protruding frames are provided. The lower surface of the lower protruding frame abuts against the upper surfaces of both ends in the width direction of the box cover 4 and is fixed into one body by bolts. The lower surface of the upper cover 1 is fixedly installed with a water - blocking cover 2 by means of bolt connection. The upper part of the water - blocking cover 2 is provided with a water - blocking cover opening with the same size and structure as the square ventilation opening 8. The periphery of the water - blocking cover opening is a horizontal installation frame. The outer edge of the horizontal installation frame is integrally formed with an inclined surface extending outward and downward, and a notch 11 is provided in the width direction of the inclined surface.

[0027] After the upper cover 1 is installed on the box cover 4 at the specified position, the water - blocking cover 2 on its inner surface is exactly nested directly above the wind guide cover 3. At this time, the box cover 4 is fixedly connected to the wind guide cover 3, the water - blocking cover 2, and the upper cover 1 in sequence. A curved air duct is formed through the notch 11 and the louver windows 10 of the wind guide cover 3. The exhaust fan 5 can discharge the air through this curved air duct from the power supply box body.

[0028] A filter cotton 7 is fixedly arranged between the water - blocking cover 2 and the wind guide cover 3. The size and shape of the filter cotton 7 match the frames of the water - blocking cover 2 and the wind guide cover 3. The filter cotton 7 is stuck between the inner wall of the water - blocking cover 2 and the horizontal protruding edge 15 of the wind guide cover 3.

[0029] According to the experimental standard of "Degree of protection provided by enclosures - IP code" (GB4208 - 2008), the water spray rate for IPX6 is (100 ± 5) L / min, which is eight times that of IPX5. Under this experimental condition, when water is sprayed in any direction on the box cover 4, due to the large amount of water, when the water hits the upper cover 1 and the surface of the box cover 4 simultaneously, the water will splash everywhere. In this way, a part of the water will enter the upper cover 1, and then through the blockage of the water - blocking cover 2, the water will flow into the "V" - shaped groove of the air - guiding cover 3, preventing the water from flowing to the middle part of the upper cover 1, and thus further preventing the water from flowing into the chassis interior in this direction. The water that flows into the "V" - shaped groove of the air - guiding cover 3 flows out of the box through the water outlet 12.

[0030] Since the shape of the air - guiding cover 3 is designed as a "V" shape, the outer wall of the "V" - shaped structure can block the impact of most of the water flow and the water splash on the box cover 4, so that most of the water is blocked out of the box. Due to the disordered water splash, a part of the water bypasses both the "V" - shaped outer wall of the air - guiding cover 3 and the outer wall of the water - blocking cover 2, and this part of the water will further penetrate into the chassis through the air duct opening formed between the air - guiding cover 3 and the water - blocking cover 2. At this time, the filter cotton 7 will block the splash and penetration of this part of the water, especially it can block the water splash. Through the function of the filter cotton 7, a small part of the water can pass through the filter cotton 7 and flow to its inner side. Further, the upward - protruding hem provided at the inner edge of the air - guiding cover 3 will block this part of the water that enters the interior through the filter cotton 7, making the water flow through the filter cotton 7 flow back into the "V" - shaped groove of the air - guiding cover 3, and thus flowing out of the box through the water outlet 12.

[0031] The notches 11 provided on both sides of the width of the box cover 4 by the water - blocking cover 2 and the louver windows 10 provided on the outer bevel 13 of the air - guiding cover 3 can play the role of reducing wind resistance and increasing the air outlet volume. Since the water - blocking cover 2 is at a relatively far distance from the outer edge of the upper cover 1 in the front - rear direction of the box cover 4, the amount of water here is relatively small. The notches 11 are provided here on the water - blocking cover 2, which neither affects the waterproof performance nor increases the air outlet area. The opening of the louver window 10 on the air - guiding cover 3 slopes downward, which can block a part of the water splash, and at the same time reduces the exhaust wind resistance of the air - guiding cover and increases the air outlet area.

[0032] In the embodiments of the present invention, the technical features not described in detail are all prior arts or conventional technical means, and will not be elaborated here.

[0033] Finally, it should be noted that the above embodiments are only specific implementation manners of the present invention, used to illustrate the technical solutions of the present invention, rather than limiting it. The protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any person skilled in the technical field can modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the protection scope of the present invention.

Claims

1. A power outlet air duct structure with an IP56 protection rating, characterized in that, it includes a box cover (4). A square ventilation opening (8) is provided at the top of the box cover (4). An outer eaves (9) is fixedly arranged in the square ventilation opening (8). A wind guide cover (3) is fixedly installed above the outer eaves (9). A wind guide opening with the same size and structure as the square ventilation opening (8) is provided in the middle of the wind guide cover (3). The periphery of the wind guide opening is an edge frame with a V-shaped structure. A plurality of louver windows (10) with downward openings are provided on the outer hypotenuse (13) of the edge frame with the V-shaped structure. A plurality of water outlets (12) are provided at the bottom of the edge frame with the V-shaped structure. An upper cover (1) is fixedly installed above the box cover (4). At both ends of the upper cover (1) in the width direction, a lower protruding frame is integrally formed and fixedly arranged. The lower surface of the lower protruding frame is fixedly connected to the upper surfaces of both ends of the box cover (4) in the width direction. A water blocking cover (2) is fixedly installed on the lower surface of the upper cover (1). A water blocking cover opening with the same size and structure as the square ventilation opening (8) is provided in the upper part of the water blocking cover (2). The periphery of the water blocking cover opening is a horizontal installation frame. The outer edge of the horizontal installation frame is integrally formed with an inclined surface extending outward and downward, and a notch (11) is provided in the width direction of the inclined surface. A filter cotton (7) is fixedly arranged between the frame of the water blocking cover (2) and the wind guide cover (3).

2. A power outlet air duct structure with an IP56 protection rating according to claim 1, characterized in that, the edge frame with the V-shaped structure further includes an inner inclined lower edge (14), a horizontal protruding edge (15) and an inner upper hypotenuse (16). The lower parts of the outer hypotenuse (13) and the inner inclined lower edge (14) intersect. The upper part of the inner inclined lower edge (14) and the outer end of the horizontal protruding edge (15) intersect. The inner end of the horizontal protruding edge (15) and the lower part of the inner upper hypotenuse (16) intersect. The lower parts of the outer hypotenuse (13) and the inner inclined lower edge (14) intersect to form a V-shaped structure.

3. A power outlet air duct structure with an IP56 protection rating according to claim 2, characterized in that, the filter cotton (7) is clamped between the inner wall of the water blocking cover (2) and the horizontal protruding edge (15) of the wind guide cover (3).

4. A power outlet air duct structure with an IP56 protection rating according to claim 1, characterized in that, a fan fixing plate (6) is fixedly installed inside the outer eaves (9). An exhaust fan (5) is fixedly installed below the fan fixing plate (6).

5. A power outlet air duct structure with an IP56 protection rating according to claim 4, characterized in that, the fan fixing plate (6) includes an integrally formed lower horizontal plate and upper vertical plates at both ends of the lower horizontal plate. The upper vertical plates are fixedly installed inside the outer eaves (9) and on the box cover (4). A part of the upper end of the upper vertical plate extends into the lower part of the wind guide cover (3).

6. A power outlet air duct structure with an IP56 protection rating according to claim 1, characterized in that, the box cover (4) is welded above the frame of the power supply box body.

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